1 files changed, 10 insertions, 5 deletions
diff --git a/src/mbgl/programs/program_parameters.hpp b/src/mbgl/programs/program_parameters.hpp
index ad8cbf1bf8..b91b41f358 100644
--- a/src/mbgl/programs/program_parameters.hpp
+++ b/src/mbgl/programs/program_parameters.hpp
@@ -1,15 +1,20 @@
 #pragma once
 
+#include <string>
+
 namespace mbgl {
 
 class ProgramParameters {
 public:
-    ProgramParameters(float pixelRatio_ = 1.0, bool overdraw_ = false)
-      : pixelRatio(pixelRatio_),
-        overdraw(overdraw_) {}
+    ProgramParameters(float pixelRatio_ = 1.0,
+                      bool overdraw_ = false,
+                      const std::string& cacheDir_ = "")
+        : pixelRatio(pixelRatio_), overdraw(overdraw_), cacheDir(cacheDir_) {
+    }
 
-    float pixelRatio;
-    bool overdraw;
+    const float pixelRatio;
+    const bool overdraw;
+    const std::string cacheDir;
 };
 
 } // namespace mbgl